Nut-lock.



D. UNRUH.

NUT LOCK.

APPLICATION FILED rum. 1913.

1,099,272. Patented June 9,1914.

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WITNESSES INVENTOR r 0 LAMA, Wu.

NUT-LOCK.

Specification of Letters Patent.

atented June 9, 1914'.

Application filed February 7, 1913. Serial No. 746,856.

To all whom it ma concern.

Be it known t at I, DANIEL Unnon, a citizen of the United States, and resident of Delaware City, in the county of Newcastle and State of Delaware, have invented new and useful Improvements in Nut-Locks, of which the following is a specification.

My invention relates to nut locks and has for its principal object the provision of a nut lock formed of relatively few parts which will positively hold the nut against rotation in either direction upon the bolt.

A further object is to construct my nut lock without employing tangent keys, spikes or any similar means which will ordinarily prevent the repeated use of the bolt and nut.

The above and additional objects are accomplished by such means as are illustrated in their referred embodiment inthe accompanying drawings, described in the followin specification and then more particularly pointed out in the claims which are appended hereto and form a part of this application.

With reference to the drawings, wherein, I have illustrated the preferred embodiment ,of my invention as it is reduced to practice, and throughout the several views of which, similar reference numerals designate corresponding parts: Fi ure 1 is a sectional view of the nut and b t and the lockmechanism in assembled relation, illus-.

lIl tr ting them as applied to several sheets of .iron, wood or similarmaterial. Fig. 2 is I a longitudinal elevation of the locking sleeve. Fig. 3 is an end view taken at the bolt head, and Fig. 4 is a sectional view showing the nut illustrated in Fig. 1 in disassembled position. Proceeding now to the description of the drawings, the numerals 1, 2 and 3 designate what may be arbitrarily called three sheets of iron. The bolt and nut lock of my inven tion includes the bolt 4, the locking sleeve- 5 5 and the nut 6. The bolt 4 is provided at its nut engaging end with a right hand thread which is adapted for engagement with the similar thread of the reduced central bore 7 of the nut 6. The bolt 4 is rel duced at the head end to form the squared projection 8. This projection is provided for the application of a wrench or other suitable tool when the bolt is disengaged from or applied to thenut. Spaced from 5 the inner end of this reduced portion, the

bolt 4 carries the integral annular collar 9. This collar member is cut away as at 10 and 11 at diametrically opposite points for a purpose to be hereinafter disclosed. a

The locking sleeve 5 is a cylindrical metallic shell, the one end of which is headed as at 12 in the ordinary manner and the other end of which is equipped with a left hand thread. The head 12 of this sleeve member is provided withacentrally disposed circular opening which registers with and is slightly larger than the longitudinal opening of the sleeve 5. This opening in the sleeve head is of such diameter as to permit the rotation of the collar 9 and it is equipped with the diametrically opposed inwardly projecting lugs 13 and 14, which, when the bolt is projectedthrough the sleeve, registerwith the cut away portions 10 and 11 of the collar. These lugs, however, are adapted to bear against the outer face of the collar 9 when the bolt is being locked and is in engagement with the nut, and holds the bolt against outward movement.

The nut 6 as afore stated is of the ordinary type with but one difference: whereas, the ordinary nut is provided with the central internally screw threaded bore, the nut of my. device is e nipped with the small outer bore 7, whici is screw threaded in right hand direction, and is also provided with the enlarged opening 15, which is also internally screw threaded and is adjusted to receive the left hand screw threads of the sleeve 5.

In applying the device, the sleeve 5 is passed through the o enin in which the bolt is to be seated. T lie bo t 4 is projected through the sleeve, the openings 10 and 11 of the collar being in registration with the lugs 13 and. 14 of the head 12. As soonas the collar 9 is seated within the enlarged openin of the head 12, the bolt is rotated to bring t 1e lugs 13 and 14 in engagement with the outer face of the collar to prevent outward movement of the bolt. Following this step in operation, the nut 6 is applied to the threaded end of the bolt 4. It will be seen that before the nut 6 has been threaded on the bolt 5 for any appreciable distance, the left hand screw thread of the opening 15 will engage the corresponding threads of the projecting end of the sleeve 5. It being impossible then to turn the nut in one direction, with any resultant inward movement of the y oeaava nut, it becomes necessary to rotate the sleeve 5 counter-clockwise and at the same. time and with the same frequency to rotate the 12 of thesleeve bearing against the washer 16 on one side of the alined members and the nut bearing firmly against the washer 17 on the other 'side. It will be apparent that the bolt being in the position shown in Fig. 1, it will be impossible for any foreign agency to remove the nut due to the fact that the sleeve 12 and bolt4 .must be simultaneously rotated with equal frequency in opposite directions to remove 'the nut.

What is claimed is: I

L'A nut lock includin a threaded bolt having a retaining collar ormed on its head end, a threadedsleeve, means formed on said sleeve and engaging the said collarfor holding said. sleeve andsaid collar in amembled relation, and means engaging the screw threaded bolt and sleeve whereby the device is locked for the purpose set forth.

2. A nut lock including a right hand threaded bolt having a retaining collar formed on its head end, said collar bein provided with cut-out portions, a left han threaded sleeve, lugs formed upon said sleevefor engagement with the cut-out or-, tions in said collar for retaining said olt and said sleeve in. assembled relation, a

v w square end formed on said bolt member for operating said device and means engaging the screw threads of said bolt and said sleeve whereby to lock the device for the purpose set forth;

3. A nut lockrincluding a bolt provided witharight hand thread, a retaining collar 44 formed integral with'said bolt adjacent its vhead end, a-locking; sleeve having a left hand thread at its nut engaging end, said sleeve being provided with an enlarged head having a central opening adapted to}:

receive the said collar memberand a nut having a right threaded central opening and an enlarged left threaded opening'adapted respectively to receive the said bolt and sleeve members. y

4. A nut lock including a nut having a central right threaded bore communicating with the outer face'and' an enlarged left threaded bore communicating with the inner face, a right threaded bolt adapted for 55 reception within the said right threaded bore of thenut, said bolt having a reduced squared free end and an integral annular collarearried adjacent thereto, said collar being provided with diametrically opposed lock receiving slots and a lockin eve, said locking sleeve having a left thread on its oppositeend adapted for enga ement with the said left thread of the en arged bore,

.said end of said sleeve being further pro- 65 vided with an enlar ed head having a collar receivin seat an a pair of diametrically opposed col ar engaging lugs.

. DANIEL UNRUH. Witnesses: 1'

WILLIAM R. Parrnnson, ALBERT L. Ronnn'rson. 

